How can I refer to a data in a different row? - vb.net

Question

I've got an Excel file with N rows and M columns. Usually data are organized one per row, but it can happens that a data occupy more than a row. In this case how can I express that the second (or next) row has to refer to the first row?
In this example, AP.01 has got 5 rows of description, so how can I say that the other 4 rows refer also to the first code?
EDIT once that I did the association I have to export my Excel file into an Access DB. So I want to see the tables with the correct data.
If I have only one row for the description I wrote this code and it works:
If grid(r, 3).Text.Length > 255 Then
code.Description = grid(r, 3).Text.ToString.Substring(0, 252) + "..."
Else
code.Description = grid(r, 3).Text.ToString
End If
Instead if I have more than one row for the description I wrote this code and it doesn't work:
Do While grid(r, 1).ToString = ""
If grid(r, 1).ToString = "" And grid(r, 3).ToString IsNot Nothing Then
Dim s As String
s = grid(r, 3).ToString
code.Description = grid((r - 1), 3).ToString & s
End If
Loop

Answer 1

If it is a one-off, try the below. This will basically put a formula in every cell that refers to the cell immediately above it:
Select column A (from top until bottom of list (row N)
Press ctrl + g to open the GoTo dialogue
Press Special
Select Blanks from the radio buttons
The above will select all the blank cells in column A. Now enter = and press up arrow. Enter the formula by holding down ctrl while pressing enter. That will enter the same formula in every cell.

Answer 2

Try
Sub Demo()
Dim ws As Worksheet
Set ws = ThisWorkbook.Sheets("Sheet3") 'change Sheet3 to your data sheet
With .Range("A:A").SpecialCells(xlCellTypeBlanks)
.FormulaR1C1 = "=R[-1]C"
.Value = .Value
End With
End Sub

Answer 3

From your question I Guess that, you must be define a variable for last column Value. and check the value in respective column, if it is empty then use column value if not empty then take current value as last value.
'Dim LastValue as string
LastValue = sheet("SheetName").cells(i,"Column Name").value
for i = 2 to LastRow '>>>> here i am assume you run code in for loop from row to
'to last count row(LastRow as variable)
'Put your sheet name at "SheetName" and column index (like "A","B","C"...) at "Column Name"
if sheet("SheetName").cells(i,"Column Name").value <>"" then
LastValue = sheet("SheetName").cells(i,"Column Name").value
end if
'(Do your stuff using LastValue , you may generate lastvalue 1, lastvalue2 ..etc)
next'for loop end here